Home / 73,920.64-102,010.80-40,387.36

Finding the Fourth Proportional to 73,920.64, 102,010.80 and 40,387.36

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Solution

The fourth proportional to 73,920.64, 102,010.80 and 40,387.36 is: 55,734.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,920.64 : 102,010.80 = 40,387.36 : x
  2. Step 2: Convert to fraction form
    73,920.64/102,010.80 = 40,387.36/x
  3. Step 3: Cross multiply
    73,920.64x = 102,010.80 × 40,387.36
  4. Step 4: Simplify right side
    73,920.64x = 4,119,946,903.49
  5. Step 5: Solve for x
    x = 4,119,946,903.49/73,920.64
  6. Step 6: Final answer
    x = 55,734.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.